Polyurea and polyurea-epoxy microcapsules

Details Polyurea and polyurea-epoxy microcapsules Polyurea and polyurea-epoxy microcapsules

1988-02-08

1988-11-15

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524747, 427146, 427154, 42721331, 42721332, 42721333, 4283215, 428402, C08L 7500

Patent

active

047850485

ABSTRACT:
An improved process for the production of microcapsules by the use of hydrogen transfer polymerization in the presence of a mixture of emulsifiers including either an aqueous solution of a sodium salt of naphthalene-sulfonic acid-formaldehyde condensate or diphenyloxide disulfonate with a polyvinyl alcohol. The process is particularly useful for the production of microcapsules containing a colorless dye intermediate used in carbonless copy paper (CCP) applications.

REFERENCES:
patent: 2712507 (1955-07-01), Green
patent: 4680056 (1987-07-01), Komin

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